# NFPA Guide vs Decon Field Guide

The clearest difference is ads: NFPA Guide at none against Decon Field Guide's shown. NFPA Guide also leads on monetization model (free vs ad-supported) and iOS requirement (5.1.1 vs 15.1). Decon Field Guide's advantage is ratings volume (8 vs 2). On price, rating, update cadence and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.5 for NFPA Guide against 4.6 for Decon Field Guide. Both are backed by a comparable volume of ratings — 2 and 8 respectively.

NFPA Guide ships an update every 4 months, Decon Field Guide every 2 months. The most recent releases landed on September 15, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | NFPA Guide | Decon Field Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/nfpa-guide/id905065257/reviews) | **[4.6 (8 ratings)](https://appshunter.io/ios/app/decon-field-guide/id1388378944/reviews)** |
| Number of ratings | 2 | **8** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | **Free** | Ad-supported |
| Size | 39 MB | 73 MB |
| Requires iOS | **5.1.1** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Carlisle Construction Materials Incorporated](https://appshunter.io/developer/557896327) | [First Line Technology, LLC](https://appshunter.io/developer/1388378943) |

## What reviewers say

### NFPA Guide

[App page](https://appshunter.io/ios/app/nfpa-guide/id905065257)

This app helps design professionals specify building wall assemblies that meet NFPA 285 fire testing requirements. It offers over 700 tested combinations of insulation and air barrier products for commercial construction, ensuring protection against air leakage and moisture while improving energy efficiency.

**Highlights:** Specify NFPA 285 tested wall assemblies, Over 700 product combinations, Air leakage and moisture protection, Improved energy efficiency, Generate print-outs or digital images, Guidance for product selection

**Features:** macOS Compatibility

**In-app purchases:** none


### Decon Field Guide

[App page](https://appshunter.io/ios/app/decon-field-guide/id1388378944)

This reference app provides quick and efficient decontamination methods for hundreds of threats. It features a classic Threat Index, pictorial instructions, and an in-app dwell timer to guide users through mission execution. Designed for approved users, it aims to make anyone an instant decontamination expert.

**Highlights:** Threat Index for decontamination methods, Pictorial instructions, In-app dwell timer, Covers hundreds of threats, Designed for approved users

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NFPA Guide free?

NFPA Guide is free to download, with no in-app purchases.

### Is Decon Field Guide free?

Decon Field Guide is free to download, with no in-app purchases.

### Which has better reviews, NFPA Guide or Decon Field Guide?

Decon Field Guide is rated higher. NFPA Guide averages 4.5 out of 5 from 2 ratings, while Decon Field Guide averages 4.6 from 8 ratings.

### Do NFPA Guide or Decon Field Guide have ads?

Decon Field Guide shows ads; NFPA Guide does not.

### Which is updated more often, NFPA Guide or Decon Field Guide?

NFPA Guide ships an update every 4 months, and Decon Field Guide every 2 months. Most recently, NFPA Guide was updated on September 15, 2026 and Decon Field Guide on June 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*